Corona heat risk returns Thursday as Inland Empire faces extreme heat warning

Corona is included in a new National Weather Service extreme heat warning beginning at 10 a.m. PDT Thursday, July 30, and continuing through 8 p.m. PDT Sunday, August 2.

The warning covers the San Bernardino and Riverside County valleys, including Corona and other Inland Empire communities. The National Weather Service says temperatures could reach 110 degrees across the broader warning area and warns that heat-related illnesses increase significantly during extreme heat events.

What changed for Corona

The new warning follows a heat advisory that covered Corona and expired at 8 p.m. PDT Monday, July 27. Residents should not treat the 110-degree figure as a precise forecast for every part of Corona. It is the expected maximum across the larger warning area, while the National Weather Service point forecast for Corona lists lower daily highs.

Even so, the warning signals a period when outdoor conditions may become dangerous, especially during the hottest parts of the day. Outdoor workers, people exercising outside, children, older adults, people without dependable air conditioning and residents who cannot cool down safely face higher risks.

Health officials urge preparation before Thursday

Riverside University Health System has advised residents to drink fluids even when they are not thirsty, stay in air conditioning or another cool location, avoid strenuous outdoor activity, use shade and take regular rest breaks.

Those who must work or spend time outdoors should plan for water, shade and cooling breaks before the warning begins. Parents and caregivers should consider cooler indoor alternatives for children’s activities, while commuters and outdoor exercisers should avoid the hottest periods when possible.

Health officials also recommend checking on older relatives, children, neighbors who live alone and people who may lack reliable air conditioning. Pets also need attention during periods of extreme heat.

Know the signs of heat illness

Heat exhaustion can include headache, nausea, dizziness, weakness, thirst, heavy sweating and irritability. Anyone showing those symptoms should be moved to a cool or shaded place and monitored closely. Seek medical help if symptoms worsen or do not improve.

Confusion, loss of consciousness, hot skin or seizures can signal heat stroke. Heat stroke is a medical emergency. Call 911 immediately and do not wait for symptoms to improve.

Cooling options and next steps

Riverside County health officials say countywide cooling resources may include air-conditioned cool centers, libraries, community centers and malls. Residents should verify current locations, hours and any eligibility requirements before traveling.

Corona residents should prepare before Thursday morning and continue checking updated National Weather Service forecasts as the warning period approaches. Conditions can vary within the Inland Empire, but the regional alert means outdoor plans, work schedules and care for vulnerable neighbors may need to change.

Sources

• National Weather Service extreme heat warning
• Riverside University Health System heat-illness guidance